//
//  UIColor+LYString.m
//  99fenqi
//
//  Created by 吴浪 on 16/5/12.
//  Copyright © 2016年 dingli. All rights reserved.
//

#import "UIColor+LYString.h"

@implementation UIColor (LYString)
+ (UIColor *)colorWithHexString:(NSString *)hex {
   return [self colorWithHexString:hex alpha:1.0];
}

+ (UIColor *)colorWithHexString:(NSString *)hex alpha:(CGFloat)alpha {
    NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
    
    // String should be 6 or 8 characters
    if ([cString length] < 6) {
        return [UIColor clearColor];
    }
    // strip 0X if it appears
    if ([cString hasPrefix:@"0X"]) {
        cString = [cString substringFromIndex:2];
    }
    if ([cString hasPrefix:@"#"]) {
        cString = [cString substringFromIndex:1];
    }
    if ([cString length] != 6) {
        return [UIColor clearColor];
    }
    // Separate into r, g, b substrings
    NSRange range;
    range.location = 0;
    range.length = 2;
    NSString *rString = [cString substringWithRange:range];
    
    range.location = 2;
    NSString *gString = [cString substringWithRange:range];
    
    range.location = 4;
    NSString *bString = [cString substringWithRange:range];
    
    // Scan values
    unsigned int r, g, b;
    [[NSScanner scannerWithString:rString] scanHexInt:&r];
    [[NSScanner scannerWithString:gString] scanHexInt:&g];
    [[NSScanner scannerWithString:bString] scanHexInt:&b];
    
    return [UIColor colorWithRed:((CGFloat) r / 255.0f)
                           green:((CGFloat) g / 255.0f)
                            blue:((CGFloat) b / 255.0f)
                           alpha:alpha];
    
}

@end
